A GameBoy Pocket protection case sold for 800 dolars?!

Normally we post consoles only, but this is an exception! According to the auction, this carry case of the Game Boy Pocket which was made by the furniture/leather and lewelery company
Chrome Hearts, ywas sold for almost 90.000 yen (800 dolars)! we don`t know 100% what it is but according to the auction it was a prize given away in a Tetris
competition.